Photovoltaic module and photovoltaic system

Abstract

The utility model belongs to the field of photovoltaic technology, and provides a photovoltaic assembly and a photovoltaic system. The photovoltaic module comprises a photovoltaic back plate, a laminated enhanced back plate, a battery piece, a transparent organic front plate and adhesive films between the laminated layers, the transparent organic front plate comprises a first base material, a first weather-proof coating and a second weather-proof coating, wherein the two sides of the first base material are coated with the first weather-proof coating and the second weather-proof coating. According to the utility model, the two sides of the first base material of the transparent organic front plate in the photovoltaic assembly are respectively coated with the first weather-proof coating and the second weather-proof coating, so that the light permeability, the ultraviolet weather resistance and the wear resistance of the transparent organic front plate are improved, and the photovoltaic assembly is better protected; the effects of better overall reliability and longer service life of the photovoltaic module and the photovoltaic system are achieved; and through the arrangement of the reinforced back plate, the rigid strength of the photovoltaic module is improved, so that the mechanical load, heat resistance, stability and other performances of the photovoltaic module and a photovoltaic system are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaics, and in particular relates to a photovoltaic component and a photovoltaic system. Background Art

[0002] Photovoltaic modules are used to convert solar energy directly into electrical energy. Photovoltaic modules are generally made of a single-sided glass cover or a double-sided glass sandwich package. The overall weight of the module is heavy, and the cost is high during product transportation and installation. At the same time, it is not suitable for low-load roofs. In recent years, with the rapid development of photovoltaic technology, lightweight module technology has gradually become a hot topic in industry research. Currently, lightweight modules on the market usually use organic transparent front panel materials instead of front panel glass to achieve lightweight modules.

[0003] However, although the existing transparent organic front panel can reduce the weight of photovoltaic modules, the weather resistance and wear resistance of the transparent organic front panel are poor, which will affect the overall reliability and service life of the photovoltaic modules. Because the modules have no front panel glass as support, the overall rigidity is poor and the mechanical load performance is poor. Utility Model Content

[0004] The utility model provides a photovoltaic module and a photovoltaic system, aiming to solve the problems that the weather resistance and wear resistance of a transparent organic front plate are poor, the overall rigidity of the module, and the poor mechanical load performance will affect the overall reliability and service life of the photovoltaic module.

[0005] The embodiment of the utility model is implemented as follows: the photovoltaic module provided by the utility model includes: a photovoltaic backplane, a reinforced backplane laminated on the photovoltaic backplane, a battery cell laminated on the reinforced backplane, and a transparent organic frontplane laminated on the battery cell; a first back adhesive film is arranged between the photovoltaic backplane and the reinforced backplane, a second back adhesive film is arranged between the reinforced backplane and the battery cell, and a first front adhesive film is arranged between the transparent organic frontplane and the battery cell; wherein the transparent organic frontplane includes a first substrate and a first weather-resistant coating and a second weather-resistant coating coated on both sides of the first substrate.

[0006] Furthermore, the reinforced backplane includes a second substrate and a third weather-resistant coating and a fourth weather-resistant coating coated on both sides of the second substrate.

[0007] Furthermore, the third weather-resistant coating is a coating coated with acrylic resin coating and / or fluorocarbon resin coating; the fourth weather-resistant coating is a coating coated with acrylic resin coating and / or fluorocarbon resin coating.

[0008] Furthermore, the second substrate is a PP substrate containing multiple layers of glass fibers.

[0009] Furthermore, the thickness of the second substrate is specifically in the range of [400 μm, 800 μm].

[0010] Furthermore, the first weather-resistant coating is a coating coated with acrylic resin paint; the second weather-resistant coating is a coating coated with acrylic resin paint and / or fluorocarbon resin paint.

[0011] Furthermore, the first substrate is a PET substrate.

[0012] Furthermore, the photovoltaic backplane includes a third substrate, and the third substrate is a PET substrate.

[0013] An embodiment of the utility model further provides a photovoltaic system, which includes: any photovoltaic assembly as described above.

[0014] The embodiments of the utility model provide a photovoltaic module and a photovoltaic system, in which the first substrate of a transparent organic front plate in the photovoltaic module is coated with a first weather-resistant coating and a second weather-resistant coating on both sides, respectively, so as to improve the light transmittance, ultraviolet weather resistance and wear resistance of the transparent organic front plate, better protect the photovoltaic module, and achieve the effect of better overall reliability and longer service life of the photovoltaic module and the photovoltaic system; and by enhancing the setting of the back plate, the rigidity strength of the photovoltaic module is improved, so as to improve the mechanical load, heat resistance, stability and other properties of the photovoltaic module and the photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a photovoltaic module provided by an embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the structure of a transparent organic front plate in a photovoltaic module provided by an embodiment of the utility model;

[0017] Figure 3 A schematic structural diagram of a reinforced backplane in a photovoltaic module provided in an embodiment of the utility model.

[0018] Explanation of the main component symbols: 10. Photovoltaic backplane; 20. Enhanced backplane; 21. Second substrate; 22. Third weather-resistant coating; 23. Fourth weather-resistant coating; 30. Battery cell; 40. Transparent organic front panel; 41. First substrate; 42. First weather-resistant coating; 43. Second weather-resistant coating; 50. First back adhesive film; 60. Second back adhesive film; 70. First front adhesive film. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] Photovoltaic modules are usually encapsulated by a single-sided glass cover or a double-sided glass sandwich, which makes the overall weight of the module heavier, resulting in higher costs during product transportation and installation, and also limits its application on low-load roofs. In recent years, with the rapid development of photovoltaic technology, lightweight module technology has gradually become the focus of industry research. Currently, lightweight modules on the market usually use transparent organic front panels to replace traditional glass, thereby achieving lightweight modules.

[0021] Although the existing transparent organic front panel can reduce the weight of photovoltaic modules, the weather resistance and wear resistance of the transparent organic front panel are poor, which will affect the overall reliability and service life of the photovoltaic modules. In addition, since the modules have no front panel glass as support, the overall rigidity is poor and the mechanical load performance is poor.

[0022] Therefore, in order to solve the above technical problems, the utility model provides a photovoltaic module and a photovoltaic system. The photovoltaic module of the embodiment of the utility model has a first weather-resistant coating and a second weather-resistant coating on both sides of the first substrate of the transparent organic front plate in the photovoltaic module, respectively, so as to increase the water vapor barrier and UV aging resistance of the transparent organic front plate, improve the light transmittance, wear resistance, and anti-glare effects. At the same time, the first weather-resistant coating and the second weather-resistant coating protect the transparent organic front plate and the photovoltaic module, thereby improving the overall reliability and service life of the photovoltaic module and the photovoltaic system.

[0023] Since the third weather-resistant coating and the fourth weather-resistant coating are coated on both sides of the second substrate of the reinforced back sheet in the photovoltaic module, the reinforced back sheet has high mechanical strength, good heat resistance and stability, and at the same time has good adhesion.

[0024] Embodiment 1

[0025] Please refer to Figures 1 to 3 The photovoltaic module of the embodiment of the utility model comprises: a photovoltaic backsheet 10, a reinforced backsheet 20 stacked on the photovoltaic backsheet 10, a cell 30 stacked on the reinforced backsheet 20, and a transparent organic front sheet 40 stacked on the cell 30; wherein the transparent organic front sheet 40 comprises a first substrate 41 and a first weather-resistant coating 42 and a second weather-resistant coating 43 coated on both sides of the first substrate 41. The photovoltaic backsheet 10, the reinforced backsheet 20 and the transparent organic front sheet 40 are stacked in sequence to form the photovoltaic module, which can be applied to lightweight photovoltaic modules.

[0026] A first adhesive film 50 is disposed between the photovoltaic back sheet 10 and the enhanced back sheet 20 , and a second adhesive film 60 is disposed between the enhanced back sheet 20 and the cell 30 . A first adhesive film 70 is disposed between the transparent organic front sheet 40 and the cell 30 .

[0027] The first back adhesive film 50, the second back adhesive film 60 and the first front adhesive film 70 can play the role of bonding and buffering; the photovoltaic backplane 10 and the enhanced backplane 20 can be firmly combined together by the provision of the first back adhesive film 50, so as to ensure that the photovoltaic module remains stable under various stresses; the enhanced backplane 20 and the battery cell 30 can be tightly combined by the provision of the second back adhesive film 60, and additional support and protection can be provided to the battery cell 30 to prevent the battery cell 30 from being damaged by vibration or impact during transportation and installation, so as to ensure that the photovoltaic module remains stable under various stresses; the transparent organic front plate 40 and the battery cell 30 can be firmly combined by the provision of the first front adhesive film 70, so as to ensure close contact between the transparent organic front plate 40 and the battery cell 30, thereby ensuring effective transmission of light and efficient operation of the battery cell 30, and the first front adhesive film 70 also provides additional protection for the battery cell 30 to prevent the direct influence of the external environment on the battery cell 30, so as to ensure that the photovoltaic module remains stable under various stresses.

[0028] Specifically, the first back adhesive film 50, the second back adhesive film 60 and the first front adhesive film 70 can all be conventional photovoltaic films, for example, they can be EVA (ethylene-vinyl acetate copolymer) photovoltaic film, POE (polyolefin elastomer) photovoltaic film, EPE (ethylene-propylene copolymer elastomer) photovoltaic film or PVB (polyvinyl butyral) photovoltaic film, but are not limited to these.

[0029] Furthermore, in order to solve the problem of poor weather resistance and wear resistance of the organic front plate in the prior art, for the transparent organic front plate 40 of the photovoltaic module in the embodiment of the utility model, both sides of the first substrate 41 in the transparent organic front plate 40 are coated with weather-resistant coatings, that is, the first weather-resistant coating 42 and the second weather-resistant coating 43 are respectively coated on the opposite sides of the first substrate 41 in the thickness direction.

[0030] Because the weather-resistant coating can effectively block and absorb ultraviolet rays, preventing ultraviolet rays from degrading organic materials; and the weather-resistant coating has good antioxidant properties, which can prevent oxygen and other active substances in the air from reacting with organic materials and reduce oxidation damage; in addition, the weather-resistant coating also has a certain hardness and wear resistance, which can protect the surface of the organic material from mechanical wear, thereby extending the service life of the material. Therefore, by coating the first weather-resistant coating 42 and the second weather-resistant coating 43 on both sides of the first substrate 41, the first weather-resistant coating 42 and the second weather-resistant coating 43 can protect the transparent organic front plate 40 and the photovoltaic module, that is, it can achieve the effect of improving the water vapor barrier, ultraviolet aging resistance, light transmittance, wear resistance, and anti-glare of the transparent organic front plate 40, and at the same time improve the overall reliability and service life of the photovoltaic module. In addition, by setting the first weather-resistant coating 42 and the second weather-resistant coating 43, it is also possible to achieve the effect of increasing the bonding performance between the transparent organic front plate 40 and the first front adhesive film 70.

[0031] Furthermore, in the photovoltaic module of the present invention, a reinforced back sheet 20 is added between the photovoltaic back sheet 10 and the transparent organic front sheet 40, and the reinforced back sheet 20 is used to improve the rigidity of the photovoltaic module. Therefore, by providing the reinforced back sheet 20, the rigidity, structural strength, stability, mechanical load performance and impact resistance of the photovoltaic module are increased. The photovoltaic module can withstand greater mechanical stress during production, transportation, installation and use, reduce the risk of performance degradation and damage caused by bending or deformation, and is not prone to hidden cracks and fragments.

[0032] Embodiment 2

[0033] Based on the first embodiment, Figure 3 As shown, with regard to the specific structure of the reinforced backplane 20 , in a possible implementation, the reinforced backplane 20 includes a second substrate 21 and a third weather-resistant coating 22 and a fourth weather-resistant coating 23 coated on both sides of the second substrate 21 .

[0034] Specifically, in order to ensure the weather resistance of the reinforced backplane 20, the reinforced backplane 20 of the embodiment of the utility model is also coated with a weather-resistant coating on both sides of its substrate, that is, the third weather-resistant coating 22 and the fourth weather-resistant coating 23 are respectively coated on the opposite sides in the thickness direction of the second substrate 21, thereby improving the weather resistance and mechanical load performance of the reinforced backplane 20 and the photovoltaic module; and through the provision of the third weather-resistant coating 22 and the fourth weather-resistant coating 23, it is also possible to achieve the effect of improving the bonding performance between the reinforced backplane 20 and the first backing film 50 and the second backing film 60, thereby improving the overall reliability and service life of the photovoltaic module.

[0035] Embodiment 3

[0036] Based on Example 1, please continue to refer to Figure 2 , for the specific material composition of the transparent organic front plate 40. In a possible implementation, the first weather-resistant coating 42 is a coating coated with acrylic resin paint; the second weather-resistant coating 43 is a coating coated with acrylic resin paint and / or fluorocarbon resin paint. In addition, the first weather-resistant coating 42 and the second weather-resistant coating 43 are both transparent coatings.

[0037] Specifically, the first weather-resistant coating 42 is arranged on the side of the transparent organic front plate 40 away from the enhanced back plate 20, and the second weather-resistant coating 43 is specifically arranged on the side of the transparent organic front plate 40 close to the enhanced back plate 20. Therefore, the first weather-resistant coating 42 is the outermost layer of the photovoltaic module and is directly in contact with the external environment. Because acrylic resin has a benzene ring and a carbon-carbon double bond, these structures have a low ability to absorb ultraviolet rays, so they are relatively stable under ultraviolet radiation and have excellent ultraviolet weather resistance. Therefore, by setting the first weather-resistant coating 42 as a coating coated with acrylic resin paint, the effect of improving the ultraviolet resistance and wear resistance of the transparent organic front plate 40 and the photovoltaic module can be achieved. At the same time, the overall reliability and service life of the photovoltaic module are further improved. As for the second weather-resistant coating 43, it can be set as a coating coated with acrylic resin paint and / or fluorocarbon resin paint.

[0038] Specifically, the thickness range of the first weather-resistant coating 42 is [10 μm, 20 μm], and the thickness range of the second weather-resistant coating 43 is [5 μm, 15 μm], but it is not limited thereto, and the user can adjust it according to the actual situation. Moreover, by setting the first weather-resistant coating 42 to be coated with acrylic resin paint, and the second weather-resistant coating 43 to be coated with acrylic resin paint and / or fluorocarbon resin paint, the effect of improving the adhesion between the transparent organic front plate 40 and the adhesive film can also be achieved.

[0039] Furthermore, in a possible implementation, the first substrate 41 may be a PET (polyethylene terephthalate) substrate. Since the PET material itself has high tensile strength and rigidity as well as good weather resistance, the first substrate 41 may be a PET substrate to further enhance the weather resistance and wear resistance of the transparent organic front plate 40, thereby improving the overall reliability and service life of the photovoltaic module. The thickness range of the first substrate 41 is specifically [280μm, 320μm], and the user may adjust it according to actual conditions.

[0040] Therefore, by setting the first weather-resistant coating 42 to be coated with acrylic resin coating, the second weather-resistant coating 43 to be a coating coated with acrylic resin coating and / or fluorocarbon resin coating, and the first substrate 41 to be a PET substrate, the transparent organic front panel 40 can have good water vapor barrier properties, excellent UV aging resistance, high light transmittance, high wear resistance and good adhesion.

[0041] Embodiment 4

[0042] Based on Example 2, please continue to refer to Figure 3 , for the specific material composition of the enhanced backplane 20. In a possible implementation, the third weather-resistant coating 22 is a coating coated with acrylic resin coating and / or fluorocarbon resin coating; the fourth weather-resistant coating 23 is a coating coated with acrylic resin coating and / or fluorocarbon resin coating. The thickness range of the third weather-resistant coating 22 is specifically [10μm, 50μm], and the thickness range of the fourth weather-resistant coating 23 is specifically [10μm, 50μm], and the user can adjust it according to the actual situation.

[0043] Specifically, therefore, by setting the third weather-resistant coating 22 to be a coating coated with acrylic resin coating and / or fluorocarbon resin coating, and the fourth weather-resistant coating 23 to be a coating coated with acrylic resin coating and / or fluorocarbon resin coating, it is possible to enhance the weather resistance and adhesion of the back panel 20, thereby improving the overall reliability and service life of the photovoltaic module.

[0044] Furthermore, in a possible embodiment, the second substrate 21 is a PP (polypropylene) substrate containing multiple layers of glass fiber. Specifically, for the reinforced backplane 20, its second substrate 21 is specifically made of PP material superimposed with multiple layers of glass fiber, and the PP material is melted and infiltrated on the glass fiber to form the second substrate 21. Because the glass fiber can provide better rigidity and strength, the infiltration of the PP material further enhances the strength of the overall structure. Therefore, the second substrate 21 is a PP substrate containing multiple layers of glass fiber, which can enable the reinforced backplane 20 to withstand greater mechanical stress, thereby improving the overall mechanical load reliability and service life of the photovoltaic module. Among them, the thickness range of the second substrate 21 is specifically [400μm, 800μm], and the user can adjust it according to actual conditions.

[0045] Therefore, by setting the third weather-resistant coating 22 to a coating coated with acrylic resin coating and / or fluorocarbon resin coating, the fourth weather-resistant coating 23 to a coating coated with acrylic resin coating and / or fluorocarbon resin coating, and the second substrate 21 to a PP substrate containing multiple layers of glass fiber, the reinforced backboard 20 has mechanical strength, heat resistance, stability, and at the same time has good adhesion.

[0046] In the present invention, the substrate (first substrate 41) constituting the transparent organic front plate 40 can be specifically a PET substrate, and the substrate (second substrate 21) constituting the reinforced back plate 20 can be specifically a PP substrate containing multiple layers of glass fiber. In addition, the transparent organic front plate 40 and the reinforced back plate 20 are stacked, that is, the warping direction can be neutralized, thereby reducing the overall warping of the photovoltaic module and improving the flatness.

[0047] Embodiment 5

[0048] Based on the third embodiment, in a possible implementation manner, the photovoltaic backsheet 10 includes a third substrate, and the third substrate is a PET substrate.

[0049] Specifically, in the embodiment of the utility model, the third substrate of the photovoltaic backsheet 10 is specifically a PET substrate. Therefore, the substrates of the front sheet and the back sheet of the photovoltaic module are both PET substrates, which can effectively alleviate the problem of thermal warping of the laminated material, thereby improving the flatness of the photovoltaic module, and improving the aesthetics and installation convenience of the photovoltaic module. Further, the photovoltaic backsheet 10 can include a KPC structure backsheet or a CPC structure backsheet.

[0050] In the description of this specification, the description with reference to the terms "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0051] In addition, the above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A photovoltaic module, characterized in that: The photovoltaic module comprises: A photovoltaic backplane, a reinforced backplane stacked on the photovoltaic backplane, a battery cell stacked on the reinforced backplane, and a transparent organic front plate stacked on the battery cell; A first back adhesive film is arranged between the photovoltaic backplane and the enhanced backplane, a second back adhesive film is arranged between the enhanced backplane and the battery cell, and a first front adhesive film is arranged between the transparent organic front plate and the battery cell; The transparent organic front plate includes a first substrate and a first weather-resistant coating and a second weather-resistant coating coated on both sides of the first substrate.

2. The photovoltaic module according to claim 1, characterized in that: The enhanced back sheet includes a second substrate and a third weather-resistant coating and a fourth weather-resistant coating coated on both sides of the second substrate.

3. The photovoltaic module according to claim 2, characterized in that: The third weather-resistant coating is a coating coated with acrylic resin coating and / or fluorocarbon resin coating; the fourth weather-resistant coating is a coating coated with acrylic resin coating and / or fluorocarbon resin coating.

4. The photovoltaic module according to claim 2, characterized in that: The second substrate is a PP substrate containing multiple layers of glass fibers.

5. The photovoltaic module according to claim 2, characterized in that: The thickness of the second substrate specifically ranges from [400 μm to 800 μm].

6. The photovoltaic module according to claim 1, characterized in that: The first weather-resistant coating is a coating coated with an acrylic resin coating; the second weather-resistant coating is a coating coated with an acrylic resin and / or a fluorocarbon resin coating.

7. The photovoltaic module according to claim 1, characterized in that: The first substrate is a PET substrate.

8. The photovoltaic module according to claim 7, characterized in that: The photovoltaic back sheet includes a third substrate, and the third substrate is a PET substrate.

9. A photovoltaic system, characterized in that: The photovoltaic system comprises: a photovoltaic assembly according to any one of claims 1 to 8.

Images